jafar Belali voshmehsara; Saeed Arsham; Shahab Parvinpour; Fazlollah Bagherzadeh
Abstract
One of the key factors for success in sport competitions is the ability to predict the movements of an opponent before performing them. The aim of the present study was to determine the effect of choking under pressure on predictive performance and to compare it between elite and novice fencers. In this ...
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One of the key factors for success in sport competitions is the ability to predict the movements of an opponent before performing them. The aim of the present study was to determine the effect of choking under pressure on predictive performance and to compare it between elite and novice fencers. In this quasi-experimental study, the subjects included 15 elite athletes of the youth fencing national team (16-20 years old) and 15 students from University of Tehran (18-22 years old) as novice athletes who were assigned to two groups by convenience sampling method. Prior to the test, 15 clips out of 100 video clips of different attacks on different parts of the fencers' body were performed and recorded by two professional members of the Iran National Fencing Team. After each video clip was stopped (before the sword hit the opponent's body), an answer sheet appeared on the screen and the subjects had to predict the location where the sword hit the opponent. The present study was conducted under high and normal pressure conditions. The high pressure condition was applied by the presence of a national team coach as the evaluator and in the non-pressure condition, the efforts were made without the presence of the evaluator. The results of mixed factor analysis of variance showed that the main effect of condition and group was significant but the interactive effect of condition and group was not significant. Bonferroni post hoc test results also showed that those players who were in normal condition had better predictive performance than those who were under the pressure condition; also, elite players had better predictive performance than novices in both conditions (P<0.05). But generally, choking under pressure decreases predictive performance in both elite and novice fencers.
Daryoush Khajavi; Ahmad Farrokhi; Ali Akbar Jaberi Moghadam; Anushiravan Kazemnejad
Abstract
The aim of this research was to examine the effect of a training interventionprogram on fall-related motor performance in the male elderly with no regularphysical activities. For this purpose, 39 out of 130 participants in screen test wereselected and assigned to training group (n=20) and control group ...
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The aim of this research was to examine the effect of a training interventionprogram on fall-related motor performance in the male elderly with no regularphysical activities. For this purpose, 39 out of 130 participants in screen test wereselected and assigned to training group (n=20) and control group (n=19). Subjectsaged between 60 and 70 in experimental were 73.68% and in the control group43.75% and subjects aged 71 and above were 26.31% in the experimental groupand 56.25% in the control group. Experimental group participated in a 10-weekintervention program (3 sessions per week and 90 minutes per session). Data werecollected with 30-s seat, sit and reach, one-leg standing (eyes open and closed), upand go, 10-meter walk and 10-meter obstacle walk tests. In this semi-experimentalresearch, Kolmogorov-Smirnov and independent t test was used to analyse motorperformance measures. Results indicated a significant improve in mean scores oflower extremity strength (27.37 rep), flexibility (29.28 cm), static balance with eyesopen (60.94 sec) and closed (19.36 sec), agility and dynamic balance (4.10 sec),10-meter walk (3.35 sec) and 10-meter obstacle walk (4.03 sec) in the experimentalgroup after the 10-week training intervention program (P<0.05). The findingsconfirmed the effect of training interventions (especially strength training) onimproving fall-related motor performance and preventing probable falls in theelderly.
Valiollah Kashani; Mansoreh Azari; Ahmad Nikravan
Abstract
The special skill is highly specific skill embedded within a more general class of skills or, as a dictionary definition would suggest, an exception to the rule. The present study attempted to investigate the emergence of especial skill in shooting with air gun at two skill levels (skilled, novice). ...
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The special skill is highly specific skill embedded within a more general class of skills or, as a dictionary definition would suggest, an exception to the rule. The present study attempted to investigate the emergence of especial skill in shooting with air gun at two skill levels (skilled, novice). The population studied here included all male and female shooters from the city of Semnan. The study was conducted on a sample of 40 shooters, consisting of two groups of women with the mean age of M= 21.33 and two groups of men with the mean age of M= 23.44, who performed shooting with air gun at five distances (8, 9, 10, 11, 12 meters) from the target. The data were analyzed using descriptive statistics (mean, standard deviation, tables, and figures) as well as inferential statistics (regression and one-way analysis of variance). Simple linear regression with the significance level P
Nikoo Khosravi; Davoud Houmanian; Masomeh Shojaee; Zohreh Eskandari
Volume 1, Issue 3 , January 2009, , Pages 51-63
Abstract
The purpose of this research was to study growth hormone (GH) response to a session of maximal exercise in active adolescents. For this purpose, 15 subjects (8 females: age 13± 0.5 yrs, height 153.25± 3.73 cm, weight 43± 5.10 kg and 7 males: age 14± 0.5 yrs, height 166.86± 6.07 cm, weight 52.86± ...
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The purpose of this research was to study growth hormone (GH) response to a session of maximal exercise in active adolescents. For this purpose, 15 subjects (8 females: age 13± 0.5 yrs, height 153.25± 3.73 cm, weight 43± 5.10 kg and 7 males: age 14± 0.5 yrs, height 166.86± 6.07 cm, weight 52.86± 5.61 kg) performed an incremental exercise protocol on a treadmill with an increasing grade until volitional exhaustion. Blood samples were collected from venous blood of the subjects before and immediately after the exercise. T-test and Pearson correlation were used to analyze the data. The results showed a significant increase in serum GH concentration after exercise in both boys and girls (P0.05). But GH response was significantly higher in girls than boys (12.39 ng/ml, 4.23 ng/ml respectively). Regression analysis revealed no significant correlation between BMI and GH responses before exercise in girls and boys. Results from the present investigation indicated an increase in GH concentration after exercise and that women had greater GH release.
Valiollah Kashani; Mansoureh Mokaberian; Behroz Gol Mohamadi; Mohammadreza Salmanzade
Abstract
The aim of this study was to determinate the validity and reliability of the Persian version of the Brief-BES Test in the elderly. The final version of the Brief-BES Test in the elderly was retranslated and developed based on the viewpoints of experts in elderly studies. 100 elderly men and women were ...
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The aim of this study was to determinate the validity and reliability of the Persian version of the Brief-BES Test in the elderly. The final version of the Brief-BES Test in the elderly was retranslated and developed based on the viewpoints of experts in elderly studies. 100 elderly men and women were voluntarily selected from Hakim Elahi nursing home in Semnan city. The data were analyzed using descriptive and inferential statistics: confirmatory factor analysis (CFA) and Cronbach’s alpha coefficient to examine factorial and construct validity and internal consistency respectively. Findings indicated good fit of the factor analysis model over the Persian version of the Brief-BES Test in the elderly. In addition, the results of Cronbach’s alpha coefficient demonstrated the acceptable internal consistency of this tool. Proper translation and selecting a heterogeneous sample may have contributed to the good fit of the factor analysis model.
Mostafa Mohammadzadeh; Mahmoud Sheikh; Khaled Takizadeh; Fatemeh Keshvari
Abstract
Background. An adolescent’s level of motor competence is important to assess as can impact on a range of daily functions and participation in physical activities. Formal assessments of motor competence can be time consuming and costly. One alternative is to use self-report questionnaires to screen ...
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Background. An adolescent’s level of motor competence is important to assess as can impact on a range of daily functions and participation in physical activities. Formal assessments of motor competence can be time consuming and costly. One alternative is to use self-report questionnaires to screen for level of motor competence. Aim: This study examines the validity and reliability of the Persian version of the Adolescent Motor Competence Questionnaire (AMCQ) and differences between adolescent boys and girls. Method: Three evaluative stages were completed to translate the items into Persian, which included back translations by 4 native English and Persian speakers and 10 expert reviews. A total of 470 adolescents aged 12-18 years old (mean age 14.22 ± 1.64) from the Ray schools district completed the 26-item AMCQ. A subsample of 30 adolescents completed the AMCQ after 1 week for retest. Results: The content validity index (CVI=0.98) was strong. The results of exploratory factor analysis identified 4 factors and the results of the confirmatory factor analysis showed that items with a suitable factor load (0.95-0.65) on the four factors. The results revealed the AMCQ had high internal consistency (0.940), and acceptable test-retest reliability (r=0.885). When considering gender, boys had higher AMCQ scores compared to girls. The boy’s scores were related to the factors of ‘participating in physical activity and sport’ and ‘peer comparisons’. Conclusion. The results of this study show that the Persian version of AMCQ can be used as a valid tool to assess Iranian adolescence motor competence.
Alireza Farsi; Mohamadreza Mahmodi; Maryam Kavyani
Abstract
Introduction: Having Control over performance is one of the most important factors for success in the shooting. Research had shown that the more information a person has about the function of their body, the better control they will have over it. This study aimed to determine the effect of heart rate ...
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Introduction: Having Control over performance is one of the most important factors for success in the shooting. Research had shown that the more information a person has about the function of their body, the better control they will have over it. This study aimed to determine the effect of heart rate biofeedback along with relaxation training on the performance and gaze behavior of shooters.Methods: 16 semi-skilled shooters with an average age of 18 to 40 years were selected using the available sampling method. Participants were homogeneously assigned to the training (heart rate biofeedback with abdominal relaxation training) and the control groups. Before and after the practice interventions, all participants performed 20 shots from a 10 meters distance, while shooting accuracy scores were measured by Scat software and their gaze behavior were measured by an eye tracking device. Then, participants of the experimental group performed 30 minutes of heart rate biofeedback and abdominal relaxation intervention for four weeks, and three sessions per week.Results: The results of two-way ANOVA showed that there was a significant difference in the shooting accuracy score of players’ performance, but there was no significant difference in the gaze behavior of shooters between intervention and control groups in the post-test compared to the pre-test.Conclusion: Overall, biofeedback with relaxation training was able to improve the performance of semi-skilled shooters. However, there was no significant difference in the gaze behavior of shooters due to the improvement of the indicators of this variable.
Ahmad Farrokhi; Ebrahim Motesharee; Rasool Zeyd Abadi; Samira Aghasi; Gholam Reza Parsa
Abstract
The aim of this study was to determine the validity and reliability of the Persian version of sport perfectionism scale of Dun et al. (2006). To determine the construct validity of the questionnaire, 393 (230 male and 163 female) athletes with different skill levels (novice, non-elite and elite) in 10 ...
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The aim of this study was to determine the validity and reliability of the Persian version of sport perfectionism scale of Dun et al. (2006). To determine the construct validity of the questionnaire, 393 (230 male and 163 female) athletes with different skill levels (novice, non-elite and elite) in 10 team and individual sports were selected by random sampling method and then completed the questionnaire. For this purpose, three sport psychologists and three English teaching experts translated the questionnaire into Persian by translation - back translation method. Then, content and face validity of the Persian version was confirmed (CVI=0.89, VCR=0.93). Confirmatory factor analysis (CFA) based on structural equations model was used to determine the construct validity of the questionnaire; Cronbach alpha coefficient was used to determine internal consistency of the questionnaire and intra-class correlation coefficient under test-retest method with a 2-week interval was used to study temporal reliability of items. The results showed that the primary model of sports perfectionism scale did not support the favorable fit and thus did not confirm the construct validity of the primary model (30 questions). But after eliminating three problematic questions, the second model with 27 questions had acceptable fit indexes (RMSEA=0.08, CFI=0.87), internal consistency and temporal reliability indicating good validity and reliability of the modified Persian version (27 items) of sport perfectionism scale. Therefore, the Persian version of the sport perfectionism scale (modified model of 27 questions) can be used to study and evaluate the personality traits of Iranian athletes.
Roya Mahdipour; Mahdi Namazizadeh; Rokhsareh Badami; Hamid Mirhosseini
Abstract
Introduction: The purpose of the current study was to examine the simultaneous effect of the transcranial direct current stimulation (tDSC) and observational learning on learning of basketball free throw. Methods: In semi-experimental study with repeated measure design, 30 novice female students ...
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Introduction: The purpose of the current study was to examine the simultaneous effect of the transcranial direct current stimulation (tDSC) and observational learning on learning of basketball free throw. Methods: In semi-experimental study with repeated measure design, 30 novice female students in free basketball throw accessibly selected and randomly located in 2 tDCS with model observation and artificial stimulation with model observation groups. In pre test phase, participants throw 15 trials basketball free throw. Intervention phase done in 5 consecutive days that each day electrical stimulation of the brain was performed from the motor cortex (C3 anode & Fp2 anode), and artificial stimulation with model observation, and then participants performed 15 free basketball throws. In last session post test phase executed. One week and 21 days after post test phase respectively executed short term and long term retention phase. Data analyzed with ANOVA with repeated measure statistical method.Results: The result indicated that tDCS with model observation (F= 22.327, sig =0.0001, η2 =0,615) and artificial stimulation with model observation (F= 3.044, sig =0.023, η2 =0,179) significantly improved basketball free throw. Other results indicated that tDCS with model observation than artificial stimulation with model observation cause improvement basketball free throw in post test (p=0.002), short term test (p=0.002) and long term test (p=0.001). Conclusion: Overall, the results of the current study indicated that tDCS with model observation can be effective as a new training method in addition to model observation to improve basketball free throw skills.
Astireh Hasani; Ali Heirani; Ayoob Sabaghi
Abstract
Introduction: Lifestyle changes and the increasing trend of children's developmental disorders, especially in the field of social interactions have made it necessary to conduct research in this field of study. So the present study aimed to investigate the action-specific perception in the different focus ...
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Introduction: Lifestyle changes and the increasing trend of children's developmental disorders, especially in the field of social interactions have made it necessary to conduct research in this field of study. So the present study aimed to investigate the action-specific perception in the different focus of attention conditions in autistic children.Methods: In a quasi-experimental study, 45 people with high-functioning autism spectrum disorder were identified and randomly divided into three Internal Attention, External Attention, and Control groups (15 people in each group). The participant's task was to throw darts and estimate the target size. After the pre-test, the groups performed the dart-throwing task in 5 blocks of 10 trials. The focus of attention instructions - specific to the experimental groups- were given before each trial, and subjects were asked to estimate the target size before performing the tasks in each block. For this, participants used a circle shape in Microsoft PowerPoint to draw a circle the same size as the darts' target. The next day, retention and transfer tests were performed.Results: The results showed that the Internal Attention group was better than the External Attention and Control groups both in dart-throwing performance in acquisition, retention, and transfer stages and in action-specific perception (P≤0.05).Conclusion: In general, the findings showed that in children with autism spectrum disorder, internal attention leads to better performance and learning than external attention. Therefore coaches and physical education teachers who work with these children should emphasize on benefits of internal focus of attention when designing training sessions.
Ahmad Rahmani; Javad Salehi; Maryam Azarshin; Tayebeh Bakhshi Nia
Volume 3, Issue 1 , June 2011, , Pages 57-79
Abstract
Researchers demonstrate that individuals in different levels of physical activity have different motivations for sport activity. This study was designed to examine how motivations can discriminate three physical activity levels (inactive, active, sustained maintainers) according to self-determination ...
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Researchers demonstrate that individuals in different levels of physical activity have different motivations for sport activity. This study was designed to examine how motivations can discriminate three physical activity levels (inactive, active, sustained maintainers) according to self-determination theory. 159 Zanjan University staff (mean age: 33 years old) completed exercise motivation inventory (EMI-2) and stage of change scale. Using confirmatory factor analysis, construct validity of EMI-2 was established. Six factors were confirmed in the EMI-2: Health and fitness, social – emotional benefits, weight management, stress management, enjoyment and appearance. Results showed that enjoyment, stress management and social – emotional benefits differentiated physical activity levels. Interaction of age and sex was not significant. It was concluded that intrinsic motivation (enjoyment) and extrinsic self-determined motivation (stress management, social – emotional benefits) played an effective role in changing behavior and increasing physical activity.
Mahmood Sheikh; javad Afshari
Abstract
The aim of this study was to investigate differences in stress coping styles between athletic and non-athletic students with high and low self-esteem. For this purpose, 465 students (118 females and 347 males, mean age 23.58+3.20 years) were selected by available sampling method. The questionnaire of ...
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The aim of this study was to investigate differences in stress coping styles between athletic and non-athletic students with high and low self-esteem. For this purpose, 465 students (118 females and 347 males, mean age 23.58+3.20 years) were selected by available sampling method. The questionnaire of coping styles (Dadsetan et al. 1384) and self-esteem (Rosenberg, 1987) were used to evaluate the variables of coping styles and self-esteem. The collected data were analyzed through descriptive statistics and MANOVA statistical models. The findings showed a significant difference in sport condition among coping styles. Also, a significant difference existed in self-esteem levels among coping styles. There was a significant interaction between sport condition and self-esteem in these coping styles. The findings showed that non-athletes with low self-esteem, non-athletes with high self-esteem, athletes with low self-esteem and athletes with high self-esteem respectively used lowest to highest level of active coping style. There was an interaction between physical activity level and self-esteem level in inflexible coping styles. Non-athletes used this coping style almost to the same extent. Athletes with high self-esteem and athletes with low self-esteem respectively used this coping style more than other groups.
Benyamin Ghelichpoor; Mehdi Shahbazi; Fazlolah Bagherzadeh
Abstract
Coordination, body and limb designs are related to the environmental objects and events. The aim of this study was to investigate the necessity to implement rope jumping program in Iran schools and since one of the major problems in learning how to write is eye–hand coordination, the effect of ...
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Coordination, body and limb designs are related to the environmental objects and events. The aim of this study was to investigate the necessity to implement rope jumping program in Iran schools and since one of the major problems in learning how to write is eye–hand coordination, the effect of a rope jumping training course on eye–hand coordination was investigated in the fourth grade elementary students. In this case, 60 male students from fourth grade of elementary schools in Baharestan city of Tehran (in 1390-91) were selected by stage sampling method and were divided into experimental and control groups. Experimental group performed the selected rope jumping program three sessions a week for 10 weeks. To evaluate the eye–hand coordination skill, the Vienna test was used in pretest and posttest. After the normality of data was tested by K-S test, they were analyzed using independent and dependent t tests at P˂0.05. Results indicated significant improvements in the experimental group (P=0.44 for the right hand and P=0.009 for the left hand). Also, there was a significant difference in the posttest mean scores of eye–hand coordination between the experimental and control groups (P=0.0009). The results showed that the rope jumping exercise program enhanced eye-hand coordination. So this research necessitated the implementation of the rope jumping program in Iran schools.
Hamideh Iranmanesh; Hesam Iranmanesh; Alireza Saberi Kakhaki; Reza Iranmanesh
Abstract
The aim of the present study was to investigate the relationship of the perception of the peer motivational climate, stress and the weekly training with burnout in junior elite athletes of Kerman province. The statistical population consisted of 120 male elite athletes from Kerman province from individual ...
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The aim of the present study was to investigate the relationship of the perception of the peer motivational climate, stress and the weekly training with burnout in junior elite athletes of Kerman province. The statistical population consisted of 120 male elite athletes from Kerman province from individual and team sports (table tennis, karate, taekwondo, badminton, cycling, handball, volleyball, basketball, football) who continuously trained at Kerman championship gym in 1391 with the age range of 15–19 years and at least 4 years of experience of participating in a sport field with medals in Iran championships. 92 athletes were randomly selected using Cochran formula. To collect data, peer motivational climate questionnaire (Ntoumanis and Vazou, 2005), athletes' burnout questionnaire (Raedeke and Smith, 2001) and perceived stress scale (Cohen et al., 1983) were used. Finally, personal demographic forms were used to determine the weekly training hours, acquired positions, the duration of activity, age and sport field. To analyze the data, Pearson correlation coefficient, multivariate regression, scatter plot and independent t test were used. The results showed a negative and significant relationship between all peer motivational climate components (except for intra-team conflict) and all burnout components (P<0.05). There was a positive relationship between intra-team conflict and burnout but this relationship was not significant (P≥0.05). There was a positive and significant relationship between perceived stress and all burnout components (P<0.05). There was no significant relationship between weekly training hours and burnout and its components (P≥0.05). Also, there was no significant difference in burnout, perception of peer motivational climate, stress and weekly training hours between individual and team sports (P≥0.05). Finally, the statistical results for prediction of burnout showed that 47.7% of burnout could be explained by the perception of peer motivational climate, stress and weekly training. In addition, stress was the dominant predictor of burnout. The results showed that paying attention to the role of peers and controlling stress during burnout process can guarantee to decrease this phenomenon in junior elite athletes and can improve their performance and stability in sport.
Ayoob Sabaghi; Ali Heirani
Abstract
This study aimed at comparing the effect of self-controlled feedback with 100% frequency on motor skill learning in children. 60 children (11.1±0.86 yr) were selected randomly and based on their pretest results divided into same three groups of 100% feedback, self-controlled and yoked. In the ...
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This study aimed at comparing the effect of self-controlled feedback with 100% frequency on motor skill learning in children. 60 children (11.1±0.86 yr) were selected randomly and based on their pretest results divided into same three groups of 100% feedback, self-controlled and yoked. In the acquisition phase, subjects completed 120 trials. At the end of the second day, subjects performed a 10-trial block as the acquisition test. After 48 hours, retention test was conducted like the acquisition test. MANOVA with repeated measures on the intra-group factor (trial blocks) was recruited in the acquisition phase and one-way ANOVA and LSD post hoc test was used for the retention phase. The results of the acquisition phase showed the significant effect of blocks (P<0.05). The findings of the retention phase showed that 100% feedback and self-controlled feedback groups had better results than the yoked group (P<0.05). Also, in two self-controlled subgroups, the group which received feedback above 50% had better performance. The pattern of these results supported former findings about the effectiveness of feedback in motor learning. In addition, it showed that frequency of feedback had to be high in children during self-controlled feedback.
Abas Akbari Varzaneh; Rokhsareh Badami; Mehdi Namazizadeh
Abstract
The main aim of the present study was to examine the effect of field-independent and field-dependent cognitive styles on learning an aiming task in closed and open environments based on fuzzy and classic logics. 60 male students with an age range of 16-17 were assigned to four groups (each group 15 subjects): ...
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The main aim of the present study was to examine the effect of field-independent and field-dependent cognitive styles on learning an aiming task in closed and open environments based on fuzzy and classic logics. 60 male students with an age range of 16-17 were assigned to four groups (each group 15 subjects): field-independent with classic approach, field-dependent with classic approach, field-independent with fuzzy approach and field-dependent with fuzzy approach. Participants in each group had basketball pass test in both open and closed environments. The acquisition phase consisted of six sessions and 60 trials in 6 blocks of 10 trials were performed in each session. The transfer test was conducted one day and retention test was carried out one week after the acquisition phase. The results of this study indicated a significant difference between field-independent and field-dependent with classic approach in both closed and open environments, and field-independent participants had a better performance during all stages of the test (acquisition, retention, and transfer). But, no significant differences were observed between field-independent and field-dependent with fuzzy approach. However, the comparison of means indicated that field-independent participants had better performance in closed environments, and, field-dependent participants had better performance in open environments.
Ali Shafizadeh
Abstract
The present study investigated the prediction of the effect and contribution of developmental and skills factors related to talent identification before football education on 10-12-year-old adolescents’ skill performance after 8 educational sessions. The statistical population inclued all ...
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The present study investigated the prediction of the effect and contribution of developmental and skills factors related to talent identification before football education on 10-12-year-old adolescents’ skill performance after 8 educational sessions. The statistical population inclued all certified football schools in Isfshan city and finally 16 schools cooperated with the researcher. The sample included 171 male adolescents (mean±SD: age 11.01±0.79 year, height 141±7.8 cm, weight 34.03 ±7.5 kg) and 4 subjects were selected from each age group of each football school by simple random sampling method. The participants' skill performance including running with the ball, turning with the ball, dribbling and speed of running were assessed by football talent identification tests derived from the Football Association of England before and after 8 sessions of football education. Reliability of these tests were 90% and their validity was 85%. Descriptive statistics and multivariate stepwise regression analysis were used in this study. Data analysis revealed 4 models to predict adolescents’ skill performance after 8 sessions of football education according to the pretests. Finally, the perfect model predicted 59.4% of variability of the critria.
Rasoul Suzande pour; Ahmad Reza Movahedi; Leila Mazaheri; Gholamreza Sharifi
Volume 1, Issue 1 , July 2009, , Pages 61-77
Abstract
The purpose of the present study was to compare the effects of two methods of self-modeling and video demonstration of an expert on the acquisition and retention of volleyball serve skill. Participants were 30 students (aged between 12 and 14) who were assigned into two homogeneous groups after the pretest. ...
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The purpose of the present study was to compare the effects of two methods of self-modeling and video demonstration of an expert on the acquisition and retention of volleyball serve skill. Participants were 30 students (aged between 12 and 14) who were assigned into two homogeneous groups after the pretest. The self-modeling group (n = 15) watched their performances in the criterion task via a video while the expert demonstration group (n = 15) observed the performance of an expert in the criterion task via a video. Both groups received the verbal cues and instructions. The two groups exercised the task for 4 weeks, 3 sessions per week. Immediately after the 12th session of exercise, a posttest, and 10 days later, a retention test was taken. Paired and independents t test were used to analyze the data. Results showed that both groups improved their performances significantly in acquisition and retention tests. No significant difference was found between the two groups in the acquisition of the skill but the expert demonstration group significantly improved their serve skill in the retention test. It seems that video demonstration of an expert improves students’ learning of volleyball serve skill.
Ahmad Ghotbi-Varzaneh; Mehdi Zarghami; Esmaiel Saemi; Farzad Maleki
Abstract
The present study aimed to examine throwing accuracy and spatial and digit
working memory of field dependent-independent participants. The group embedded
figure test (GEFT) was distributed among 320 male students and based on the
GEFT scores, 45 participants were randomly divided into field dependent, ...
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The present study aimed to examine throwing accuracy and spatial and digit
working memory of field dependent-independent participants. The group embedded
figure test (GEFT) was distributed among 320 male students and based on the
GEFT scores, 45 participants were randomly divided into field dependent, field
independent and control group (15 participants/each group). The study included
two tasks (dart throwing and spatial and digit working memory). In dart throwing
task, participants threw 10 darts in pre-test stage. In acquisition stage, participants
threw 60 darts in 6 blocks of 10 trials. The retention test included a block of 10
trials which was performed 24 hours after the acquisition stage. The spatial and
digit working memory test was performed individually with Cambridge brain
science software. Data were analyzed with 2-way analysis of variance with
repeated measures, one-way ANOVA test, Tukey post hoc test and Pearson
correlation coefficient. The results indicated that field independent participants
performed better in both tests of dart throwing and working memory than field
dependent participants. The findings indicated that higher scores of the GEFT task
demonstrated higher visuospatial ability (as a component of working memory) in
field independent participants which may cause a better performance in spatial
and digit working memory and dart throwing task.
Seyedeh Vahideh Hosseini; Monireh Anoosheh; Abbas Abbaszadeh; Mohammad Ehsani
Abstract
Family plays an important role in physical activity behaviors in children andadolescents although the procedure of this effect is not clear. This study wasdesigned to explore the family role in forming female adolescents’ physical activitybehavior. This study used a qualitative procedure and content ...
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Family plays an important role in physical activity behaviors in children andadolescents although the procedure of this effect is not clear. This study wasdesigned to explore the family role in forming female adolescents’ physical activitybehavior. This study used a qualitative procedure and content analysis method. Tocollect data, semi–structured interviews were conducted with 25 participants (16female adolescents, 7 mothers, and 2 fathers). All interviews were recorded,transcribed and finally analyzed by qualitative content analysis method. Threemain themes emerged as the family role in forming female adolescents' physicalactivity behavior: starter (talent identification, interest arousal), strengthener(providing, companionship and encouraging), and maintainer (try to eliminatebarriers and try to acquire the agreement of the disagreed member in the family).This study provided a better understanding of how families influenced their girls'physical activity behavior. Identifying the role of family can help health authoritiesand physical education coaches to design more effective family–basedinterventions and also to identify more areas for further research.
Franak Poorhosseini; Shahzad Tahmasebi Boroujeni
Abstract
The aim of this study was to investigate the effect of music types on depth perception during fatigue. Statistical population consisted of female students of Faculty of Physical Education at University of Tehran. 45 subjects (mean age 23.3 ± 2.16 years) voluntarily participated in this study. ...
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The aim of this study was to investigate the effect of music types on depth perception during fatigue. Statistical population consisted of female students of Faculty of Physical Education at University of Tehran. 45 subjects (mean age 23.3 ± 2.16 years) voluntarily participated in this study. Participants were divided into three groups: slow music, fast music and control. Initially, all subjects participated in the pretest of depth perception using depth perception apparatus. Then, they received a similar exercise until reaching the threshold of exhaustion. After reaching fatigue, their error of depth perception was reassessed. Then, participants were asked to listen to the music specific to each group for 3 minutes in order to assess the effect of music on their depth perception during fatigue. Their depth perception was immediately measured as the posttest. Analysis of variance with repeated measures and one-way analysis of variance were used to analyze the data. The results showed that fast music did not significantly change depth perception error (P=0.602), but slow music significantly reduced this error (P=0.006).
Roza Rahavi; Mohammad ali Aslankhani; Behrooz Abdoli; AbdulWahab Vahabzade
Volume 1, Issue 2 , October 2009, , Pages 65-85
Abstract
The aim of the present study was to investigate the effects of various scheduled practices (self-regulated and non-self-regulated) on the acquisition, retention and transfer of simple and complex tracking tasks. 96 right-handed undergraduate students (age rang: 18-24 years old) volunteered to participate ...
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The aim of the present study was to investigate the effects of various scheduled practices (self-regulated and non-self-regulated) on the acquisition, retention and transfer of simple and complex tracking tasks. 96 right-handed undergraduate students (age rang: 18-24 years old) volunteered to participate in this study (48 females, 48 males). These students participated in physical education classes (1 & 2) in their first semester of 1387-88. Participants were assigned to one of eight different groups (n=12), which differed in types of tasks performed (simple tracking or complex tracking) and the practice schedule used (blocked, random, self-regulated, or yoked). The method was quasi-experimental. These tasks were designed as software and appeared on a computer monitor. The movement time and movement error (click) were assigned as scores in different groups. After the pretest, the subjects practiced 8 16-trial blocks in 2 sessions. 24 hours later, they participated in the retention and transfer tests. The data were analyzed by mixed factorial ANOVA and Bonferroni post hoc test. The results showed a significant difference between various scheduled practices and type of task in various stages of movement time (P
Mehdi Shahbazi; Ali Pashabadi; Hossein Abedini Parizi
Volume 3, Issue 2 , October 2012, , Pages 65-80
Abstract
Reaction time (RT) is one of the psychomotor skills that determine athletes’ results and also in daily life. RT effective factors are divided into inherent (genetic) and environmental. Among those factors, psychological factors and mental abilities are more important due to the cognitive nature of ...
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Reaction time (RT) is one of the psychomotor skills that determine athletes’ results and also in daily life. RT effective factors are divided into inherent (genetic) and environmental. Among those factors, psychological factors and mental abilities are more important due to the cognitive nature of RT. The aim of this research was to study the relationship between RT, anxiety and IQ of athletes in different skill levels. This relationship was investigated in 85 subjects (in elite and sub elite athletes and no athletes groups) by correlation method. To measure RT, Y1000 devise was used; Spielberger state / trait anxiety inventory (STAI) was used to evaluate anxiety and Raven’s progressive matrices to evaluate IQ. One-way analysis of variance and Pearson correlation coefficient were used to analyze the data. Results showed that there was a negative significant correlation between choice RT and IQ, and between CRT and state anxiety. Findings supported inverted U hypothesis and it proved the greater influence of IQ with higher complexity of task
Rasoul Hemayattalab; Javad Afshari; Ahmad Nikravan; Ramin Baloochi
Volume 2, Issue 1 , April 2010, , Pages 75-89
Abstract
The purpose of this study was to investigate the effects of body mass index on fundamental motor skills performance in 7-8-year-old boys in Hamedan. Forthis purpose, 72 elementary students were selected via cluster randomization from the elementary schools of Hamedan and divided into three groups: fat, ...
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The purpose of this study was to investigate the effects of body mass index on fundamental motor skills performance in 7-8-year-old boys in Hamedan. Forthis purpose, 72 elementary students were selected via cluster randomization from the elementary schools of Hamedan and divided into three groups: fat, normal, and thin according to percentile diagram. Then, TGMD-2 was performed by children and data were analyzed via K-S, Leven test and ANOVA. The results indicated a significant difference in hop, broad jump and over arm throw and no difference in run and catch subscales. The post hoc test indicated that the normal group performed hop, broad jump and over arm throw better than fat group. In addition, thin group performed broad jump and over arm throw better than fat group. Presumably, the inverse relationship between high body mass index basic motor skills relate to mechanical and recognition factors, components of movement, moving body mass, component coordination and motion range.
Aliyeh Miri Ardakol; Mohammadreza Shahabi Kaseb; Rasool Zeidabadi
Abstract
Retention is one of the important indicators for inference of learning motor skill. There are some disagreements on the retention measurement concept among experts and researchers of the motor learning area. Therefore, the aim of the present study was to analyze the qualitative content of retention measurement ...
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Retention is one of the important indicators for inference of learning motor skill. There are some disagreements on the retention measurement concept among experts and researchers of the motor learning area. Therefore, the aim of the present study was to analyze the qualitative content of retention measurement concept in motor skills in Persian scientific research articles between 2009 and 2019. The present study was developmental with a quality content analysis method. 143 articles of Persian scientific research journals were studied, which mentioned the concept of retention. Data were analyzed with Nvivo10 software. Results revealed that there were 47 subsidiary topics and 6 main topics for the retention measurement concept including measurement method of retention concept, number and duration of trials in retention test, number and duration of trials in the acquisition phase, number of warm-up decrement trials, task type and detraining length. Also, the results indicated that there was no agreement among experts about the measurement method of retention concept and its related issues. This topic not only can confuse researchers on how to measure the retention concept in motor behavior area, but also can limit the possibility of comparing different research results and thus makes it hard to decide on optimal practice solutions and methods. Therefore, it is necessary to make specific decisions in this regard by holding symposiums with the participation of experts in the field of motor behavior.
